【摘要】 针对石羊河流域设施蔬菜连作土壤质量安全隐患问题,通过对建棚3～14年设施的土壤采样检测,并将各项指标与露地农田相比较,总体表现是随设施建棚年限、栽培频度增加,土壤养分、重金属、盐分等指标呈明显增涨趋势,土壤全氮、全磷、有效磷、速效钾均出现明显的累积,分别比露地农田高出35.8%、77.7%、140%和87.4%;有效锌、有效铜、有效铁分别比露地农田分别高出542%、245%和67.4%。其中土壤盐分及重金属砷、汞的残留呈现明显的累积趋势,分别高出露地农田400%、309%、871%,但尚未超出相关指标范围。更多还原

【Abstract】 Assessing of fertilizing about soil nutrient,physical and chemical properties,and heavy metals through investigation,test and analysis.The result showed that the greenhouse of soil sampled already set up 3-14 years greenhouse soil in Shiyang river valley to determine soil environmental quality items.Compared to crop land,greenhouse soil nutrients content,heavy metal residues and salt content presented a clearly increased trend with the number of greenhouse construction years increased.Greenhouse soil total N,total P,available P and K content are significant accumulation,respectively increased 35.8%,77.7%,140% and 87.4%.Available Zn,Cu and Fe content increased 542%,245% and 67.4%,meanwhile soil salt and heavy metals residue also had a cumulative trend,As and Hg respectively increased 309%,871% and 358.8% compared to crop land,But not beyond the scope of impeding crop growth limitation.The electric conductivity (EC) in greenhouses was about four times as high as that in the open fields.The greenhouse of soil heavy metals,As and Hg were higher than in the open field.However,the soil EC and heavy metals of the greenhouse was not reached.更多还原